Assessment of Osmolyte Accumulation in Heavy Metal Exposed Salvinia natans

Dhir, Bhupinder; Nasim, Sekh Abdul; Samantary, S.; Srivastava, S. N.

doi:10.3923/ijb.2012.153.158

Cited by 33 publications

(8 citation statements)

References 26 publications

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“…Combined application of 24-EBL and SA led to enhancement in osmolyte levels in the present study. Similar elevation in glycine betaine levels were observed in response to CO, Fe and Zn stress 114 . Glycine betaine levels are known to alter the membrane permeability of stressed plant cells 115 .…”

Section: Discussionsupporting

confidence: 74%

In-situ localization and biochemical analysis of bio-molecules reveals Pb-stress amelioration in Brassica juncea L. by co-application of 24-Epibrassinolide and Salicylic Acid

Kohli

Bali

Tejpal

et al. 2019

Sci Rep

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Lead (Pb) toxicity is a major environmental concern affirming the need of proper mitigation strategies. In the present work, potential of combined treatment of 24-Epibrassinolide (24-EBL) and Salicylic acid (SA) against Pb toxicity to Brassica juncea L. seedlings were evaluated. Seedlings pre-imbibed in EBL (0.1 mM) and SA (1 mM) individually and in combination, were sown in Pb supplemented petri-plates (0.25, 0.50 and 0.75 mM). Various microscopic observations and biochemical analysis were made on 10 days old seedlings of B . juncea . The toxic effects of Pb were evident with enhancement in in-situ accumulation of Pb, hydrogen peroxide (H 2 O 2 ), malondialdehyde (MDA), nuclear damage, membrane damage, cell death and polyamine. Furthermore, free amino acid were lowered in response to Pb toxicity. The levels of osmoprotectants including total carbohydrate, reducing sugars, trehalose, proline and glycine betaine were elevated in response to Pb treatment. Soaking treatment with combination of 24-EBL and SA led to effective amelioration of toxic effects of Pb. Reduction in Pb accumulation, reactive oxygen content (ROS), cellular damage and GSH levels were noticed in response to treatment with 24-EBL and SA individual and combined levels. The contents of free amino acid, amino acid profiling as well as in-situ localization of polyamine (spermidine) was recorded to be enhanced by co-application of 24-EBLand SA. Binary treatment of 24-EBL and SA, further elevated the content of osmoprotectants. The study revealed that co-application of combined treatment of 24-EBL and SA led to dimination of toxic effects of Pb in B . juncea seedlings.

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Section: Discussionsupporting

confidence: 74%

In-situ localization and biochemical analysis of bio-molecules reveals Pb-stress amelioration in Brassica juncea L. by co-application of 24-Epibrassinolide and Salicylic Acid

Kohli

Bali

Tejpal

et al. 2019

Sci Rep

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“…Remarkable differences were seen in the putrescine content with a concomitant increase in ethylene, representing that polyamines synthesis from methionine was more efficient in resistant plants than sensitive plants. Dhir et al (2012) also observed higher accumulation of glycine betaine in Salvinia natans under Fe toxicity and suggested that polyamines accumulation combat the heavy metal stress including Fe.…”

Section: Remediation Potential Through Molecular Breeding and Genetic Engineeringmentioning

confidence: 95%

Fe toxicity in plants: Impacts and remediation

Zahra

Hafeez

Shaukat

et al. 2021

Physiologia Plantarum

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Fe is the fourth abundant element in the earth crust. Fe toxicity is not often discussed in plant science though it causes severe morphological and physiological disorders, including reduced germination percentage, interferes with enzymatic activities, nutritional imbalance, membrane damage, and chloroplast ultrastructure. It also causes severe toxicity to important biomolecules, which leads to ferroptotic cell death and induces structural changes in the photosynthetic apparatus, which results in retardation of carbon metabolism. However, some agronomic practices like soil remediation through chemicals, nutrients, and organic amendments and some breeding and genetic approaches can provide fruitful results in enhancing crop production in Fe‐contaminated soils. Some quantitative trait loci have been reported for Fe tolerance in plants but the function of underlying genes is just emerging. Physiological and molecular mechanism of Fe uptake, translocation, toxicity, and remediation techniques are still under experimentation. In this review, the toxic effects of Fe on seed germination, carbon assimilation, water relations, nutrient uptake, oxidative damages, enzymatic activities, and overall plant growth and development have been discussed. The Fe dynamics in soil rhizosphere and role of remediation strategies, that is, biological, physical, and chemical, have also been described. Use of organic amendments, microbe, phytoremediation, and biological strategies is considered to be both cost and environment friendly for the purification of Fe‐contaminated soil, while to ensure better crop yield and quality the manipulation of agronomic practices are suggested.

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“…In this study, proline contents increased in M. azedarach and L. lucidum leaves in L1 and L2 treatments but decreased at L3 treatments when compared to the C ( Figure 7B). The phenomena suggested the increase of proline contents at low and medium Pb-Zn treatments could maintain the integrity of cellular membranes, protect proton pump, and eliminate ROS (Dhir et al, 2012). The decrease of proline contents in L3 treatments might be explained by the fact that the physiological functions and metabolisms of plants were seriously damaged at high concentration of Pb-Zn toxicity (Chen et al, 2003).…”

Section: Lucidum May Be More Tolerant To Pb-zn Stress Than M Azedmentioning

confidence: 99%

Photosynthesis Performance and Antioxidative Enzymes Response of Melia azedarach and Ligustrum lucidum Plants Under Pb–Zn Mine Tailing Conditions

Huang

Zhu

et al. 2020

Front. Plant Sci.

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Lead-zinc (Pb-Zn) mine tailings pose a great risk to the natural environment and human health because of their high toxicity. In this study, the responses of photosynthesis, chlorophyll fluorescence, and antioxidative enzyme of Melia azedarach and Ligustrum lucidum in the soil contaminated by Pb-Zn mine tailings were investigated. Results showed that Pb-Zn mine tailings significantly reduced net photosynthetic rates and leaf photosynthetic pigment content of both trees, and the reduction of net photosynthetic rates was mainly caused by their biochemical limitation (BL). The chlorophyll fluorescence parameters from Pb-Zn tailing stressed leaves indicated that Pb-Zn tailings affected PSII activity which was evident from the change values of energy fluxes per reaction center (RC): probability that an electron moves further than Q A − (ET O /TR O), maximum quantum yield for primary photochemistry (TR O /ABS), the density of PSII RC per excited crosssection (RC/CS O), the absorption of antenna chlorophylls per PSII RC (ABS/RC), and the turnover number of Q A reduction events (N). Pb-Zn mine tailings also affected the oxidation and reduction of PSI, which resulted in a great increase of reactive oxygen species (ROS) contents and then stimulated the rate of lipid peroxidation. Both trees exhibited certain antioxidative defense mechanisms as elevated superoxide dismutase (SOD), peroxidase (POD), and catalase (CAT) activities, then declined under high level of Pb-Zn tailing treatment. Comparatively, L. lucidum showed less extent effect on photosynthesis and higher antioxidative enzyme activities than M. azedarach; thus L. lucidum was more tolerant than M. azedarach at least under the described Pb-Zn tailing treatment. These results indicate that the effect of Pb-Zn mine tailings on photosynthesis performance mainly related to imbalance of the PSII activity and PSI redox state in both trees. We propose that M. azedarach and L. lucidum could relieve the oxidative stress for phytoremediation under the appropriate Pb-Zn mine tailing content.

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Assessment of Osmolyte Accumulation in Heavy Metal Exposed Salvinia natans

Cited by 33 publications

References 26 publications

In-situ localization and biochemical analysis of bio-molecules reveals Pb-stress amelioration in Brassica juncea L. by co-application of 24-Epibrassinolide and Salicylic Acid

In-situ localization and biochemical analysis of bio-molecules reveals Pb-stress amelioration in Brassica juncea L. by co-application of 24-Epibrassinolide and Salicylic Acid

Fe toxicity in plants: Impacts and remediation

Photosynthesis Performance and Antioxidative Enzymes Response of Melia azedarach and Ligustrum lucidum Plants Under Pb–Zn Mine Tailing Conditions

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